Mission Viejo Weather in December

With daytime temperatures of 19°C (66°F) and nighttime lows of 9°C (48°F), December in Mission Viejo brings pleasant temperatures during the day. It is also the wettest month of the year, so pack an umbrella.

Rainfall in Mission Viejo in December

This month sees the most rain, so carrying an umbrella will ensure you stay dry. Records from the past 30 years suggest around 8 days of rain, with 81 mm (3.2 in) average for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Mission Viejo in December

If you're visiting Mission Viejo in December, expect highs of 19°C (66°F) and overnight lows around 9°C (48°F). December is part of the winter season. The difference between afternoon and evening temperatures is usually noticeable. With lows around 9°C (48°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep. Enjoy a month of comfortably warm temperatures, despite being cooler than other months.

Sunshine in Mission Viejo in December

The city usually sees around 205 hours of sunlight, indicating many sunny days — a great month for sightseeing.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Mission Viejo. Our weather planner can help you explore destinations with more pleasant weather conditions.

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For a detailed overview over the year and the best time to visit the United States of America, check out our Mission Viejo's climate page.

Mission Viejo Temperature in December

Min Temperature 9°C (48°F)  

Max Temperature 19°C (66°F)  

Chance of Rain 27%  

Precipitation 81 mm (3.2 in)  

Rainy days 8 days  

Sunshine 205 hours *  

Percentage Sunshine *  

* Data from: Corona, the United States of America (32 KM, 19 Miles).

What to Wear in Mission Viejo in December

For Mission Viejo in December, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Mission Viejo in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

9/10

Walking

9/10

Camping

4/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Mission Viejo's climate page.

More climate data for Mission Viejo

Temperature Rainfall Sunshine

See the full Mission Viejo climate overview or explore weather in the United States of America.